Opening ceremonies in the 4th annual Marine Corps Trials for combat wounded, injured and ill service members are Thursday afternoon at Camp Pendleton. Competition in the paralympic-style event, which is open to the public, begins Friday.

The trials continue through March 12 for more than 300 athletes facing off in archery, shooting, swimming, track, field, cycling, sitting volleyball, and wheelchair basketball. Practice began Tuesday.

The Marine Corps Trials are an opportunity “to further the rehabilitation of their minds, bodies, and spirits through competition and camaraderie,” Capt. Ryan Powell, a spokesman for the Marine Corps’ Wounded Warrior Regiment, announced.

Some use the trials as a milestone in personal athletic goals. Others enjoy the social aspects most. “For all of the participants, the trials are a chance to come together and focus on their abilities, not their disabilities,” Powell said.

These “wounded warriors demonstrate the true example of the indomitable fighting spirit and unquenchable fire that exists in the heart of every Marine.”

Participants are divided into teams of active duty, veteran and international participants, including athletes this year from Australia, Canada, Colombia, France, Georgia, Germany, the Netherlands, New Zealand, and the United Kingdom.

Winners at the Marine trials could have the chance to compete in the 2014 Warrior Games, Sept. 28-Oct. 4, which also includes athletes representing the Army, Navy, Air Force and Special Operations.

Spectators for the Camp Pendleton trials are welcome. Parking and admission are free to the public. Non-military spectators need to bring a valid driver’s license and registration. All visitors must enter Camp Pendleton using the far right visitor lanes at each gate.